i have removed my cast headers and fitted some tubular ones but i cant get the o2 sensor out. will i be ok to run my car without one for the time being or will my car over fuel like mad? this is on a classic by the way

 

I t should overfuel but not sure if really bad - don't think you'll harm the engine (rather over, than under anyhow).

But I'd only do this as a short term solution while you gat a machine shop to get the sensor out of your old headers - to reuse in the new ones.

 

thanks for thr replie mate